Feed-controlling device



Sept 15, 1925.

G. H. GLASER FEED CONTROLLING DBVICE Filed Feb. 15,

jirvez i 7''! Ge 07192} Z 6'6 J4 (llaremontgin thecounty-rot Sullivan and Feed-Controlling'Devices of which theflfol lowing is a1'full, clear-, and exact-specification;v this bushing Patented Sept. 15, 1925.

' messes '-ceasesH; essee y raeenqm HiAMrsnIfREf ssurance To SULLIVAN "MACHINERY ceMrANY? A QOBEGBATIQNOF MASSACHUSETTS.

rnnn-con morrme' DEVICE.

"j Application filed Tebruary-15,*'1919.- Serial No. 277,347.

' To all whom it mag fjcohc'em:

'fBe" it known that I, 'GEORGEV v GLASER,

'g'a citizen of the United States, {residing at State' of Newi Hampshire -have invented jce'rtain" new and us'ezt'ulimprovements; in

This invention relates to feed-controlling fdevices" and'more especially, though not ex clusivelyyto' means; 7 for controlling the ac-' .tion of the pressure fluid -piston' of apres'sure fluid impact itoolysuch, for example; as ,ast'oping roclrdrill.

I? My invention 'hasamong its objects tofprovide'an improvedfeed controlling device. 1 A further-ohfect ofjny" invention is to pro- 'videan improvedfeedv brakingmeans which -may"be' attached to a complete stoping drill.-

Another object *of my invention isto provide an improved braking and'lcrake controlling means which "may be point desired. :These and othe'r objects and advantages of my improvement will, how-'- F 'ever hereina ftermore-fnlly appear.

operated fromany- While my "improved "feed 3 controlling meansis adapted to devices wherein the' feed" cylinder moves'relati-velytolthe: piston or the piston movesrelatively' to the cylinder, in the accompanying drawings I have'shown the'same' for purposes of illiistration applied to a feeding mechanism "of the former, type;

= Intliese-drawings,-

s, (Fig. l i sf a. side elevation 'iof' astop'ing drill provided with my'improved retarding Fig; 2 is a longitudinal-sectionalview of a part theredf'taken substantiallyon the-line 2 2,Fi 1. J

F ig. 3-is anenlarge'd r'd'etailsectionalview In this illustrative construction I have 1 shown a pneumatic hammer lhaviiig a piS- ton 2 movable therein and adaptedgin its forward movement t'o-impart a hlowtorthe shank end of a" drill steel 3'=to-force the' bit end of the'latterI-against the-material tobei cut.

' 'endanair fe'ed piston 7. Thelatter is Moi'inted on: the rear-"end ofIthis cylinder -'preferably provided in "well krio'wn man- ."havifig a slidingri'fitfor a; portionof its nerwi'th a"plurality.'ofz nup leathers 8 to feed; cylinder andv make thepiston air-tight respect to I the cylinder" 5. The rear end of "the air feed cylinder 5 Y is partially closed-Joy bushi-ng 9,'the air feed piston passing through an 'aopening formed centrally therein. In stoping drills wherein pressure fluid'is admitted -toboth sides of the *air feed piston. head,

will constitute the rear cylin- -"-derhe'ad. V p

, As is common-in devices of this type'now i used commercially; a; pneumatic cylinder i'ihe-ad plug 1O is carried by th'efcy linder; head block 4,; this plug being provided with a collarll formed-thereon in'such a manner tliat-it projects into-the air feed cylinder andthat a recess 12 isformed between this ;-col1a-r and the forward-end of thefeedcylinder. cii'recess -13is formed in the feed piston 7 in axialalinmentwitlrthe collar 11 in-such amanner thatthe collar may bere ceived'by the recessedpi'ston'hcad when the latter" is in its innermost-position,- -and a 'non -positive locking-ring-lt is mounted in this recess 18" to frictionally engage the outer surface of the collar 11 to "hold the piston lagainst displacement: when it" isdesired to transportthe-stopingdrill.

In the form of the-deviceshown, allhandle -15- is' providedtby means'of' which the operator 'keeps the "pneumatic hammer from rotating during the drillingvoperation' and, as is" common in devices" of this I type, this handle is inade :hollow in order'that it''m-ay serve ias an oil "reservoir; afilling cap. 16 "heingprovided' on thei'outer "end ofthe handle" to permit the filling 'of the latter with lubricant-,9 A valve 17"is preferably ,*mounted'"0n 'the' oppositeside from the "handle 15'; this valve serving to "control the 7 "pressure fluid'supply from the supply line I taken on th line 3-3, Figs. land 2,

1 '19"to"'both the pneumatic feed. cylinder and the'pn'eumatic tool. Since the parts so in ii described are f'common' to certain types of well known stopi-ng drills} it is" thought "that a further description 'of*-these:"parts ortheir" operation is nnnecessary. Mou'nted' ad'ace'nt 'the'irear end "of the pneumatic feed cylinder'is a circular metal ri-ng'2O which maybe fastened to the' cylinder loy" heingwelded'thereon, this flange beingprovided withears 21', as is clearly shown. "In "the? form" of my-improvement here-in shown," a sleeve 22 is'carried jon-the A same end xaof the steed cylinder the 1 sleeve length on the cylinder, and being rigidly attached thereto by means of bolts 24 passed through lugs 23 formed on the sleeve and the ears 21 formed on the flange 20. This sleeve is provided with a hole adapted to receive the air feed piston rod 6, as shown.

, brake lining 26 of asbestos fiber or other similar. material. The aperture in the disk receives the air feed pistonrod 6 and is adapted, when moved out of a plane substantially at right angles to the axis of the piston, to force the friction band 26 against the piston'rod and retard the longitudinal movement of the piston 7 in the cylinder 5. This disk is preferably placed within the sleeve 22 and is preferably attached to this sleeve by an ear 27 fastened to the disk 25 near the thinner wall of the disk, ears 28, preferably formed integral with the sleeve, and a pin 28 passed through the ears. as shown. For the purpose of normally retaining the disk in a plane substantially at right angles to the axis of the feed piston rod there is provided a small coiled spring 29 seated in a recess 30 in the end plate 22 of the sleeve and adapted to press against the disk near the thicker wall of the latter to move this, edge of the disk away from the end wall of the sleeve. The hole is formed eccentrically in the disk 25 in order to permit the placing of the pivot 28 between the disk and the sleeve 22 and to allow the disk controlling means to act upon the op-' posite side of the disk.

In my improved feed controlling means, I

preferably employ means whereby the disk maybe moved out of the aforesaid plane, and whereby this movement is easily per-. formed by the operator no matter what the length of the feed pressure cylinder 5 may be, nor the position in which the stoping drill may be placed when Working. In my improved form, this means preferably consists of an actuating rod 31 placed substantially parallel to the cylinder 5, the rod carrying on one end coarse threads 32 coacting with coarse threads 33 formed on the inner wall of the sleeve 22, whereby when the rod is rotated a small projection 34 formed on the end of the rodwithin the sleeve forces the disk toward the end plate of the sleeve against the tension of the spring 30, thereby binding the friction band against the feed rod 6. To bring the control of the rod 31 easily within the grasp of the operator, I preferably extend the rod 31 along one side of the cylinder 5 to a point adjacent the head block 4, and support this end by means of a split ring 35 which is clamped securely to the cylinder 5 by a tan gential bolt 36.. As shown, the rod 31 exall.

latter is rotated. A handle 39 is preferably hingedly secured to this clip by a pin 10 in such a manner that the handle may be rotated about the pin i0 and normally lie out of the way against thering, as is shown in dotted lines, the operative position of the handle being shown in full lines, in which position the operator may readily and easily rotate the rod 31 to advance the rod by means of the threaded connection with the sleeve 22 to force the disk into binding fric tional engagement with the pistonf'eedrod, as has been described.

From the foregoing, the operation of the device will be readily understood, it being clear that the spring 29 normally retains the disk 33 out of frictional engagement with the feed rod, the projection 34'on the end of the control rod 31 serving as a stop to limit the movement of the disk under the pressure exerted by the spring. When the air or other pressure fluid is admitted to the feed cylinder and the pneumatic toolis fed forward toward the work, the pressure with which the feed cylinder forces the tool against the work may be easily regulated by turning the handle 39 so as .to obtain any frictional engagement desired between the disk and the rod, and thereby neutralize a part of thepressure exerted by the pressure fluid against the feed piston head 7.

It should be noted that the handle 39 is placed very close to the head block t which carries the valve controlling handle 18, so that the handle 39 may be grasped in one hand and the handle 18 in the other, and the operator may easily control all parts of the apparatus without changing his posltion and without taking his 'eyes off the work. Further, it should be noted that while this apparatus may easily bebuilt into or as a part of the feed cylinder, it is 7 that the only element which will receive any appreciable wear, that is, the friction band, may be easily taken out and replaced. withoutv disassembling the feed mechanism at The frictional engagement between the threads 32, 33 is great enough to. hold the rod 31 in any of its adjusted operative posi tions' and serves as a non-positive locking fists, 608

means to the 'I' oroutof engaging "position. H I I ,7 however,"bejappa?rent to thoseskiflled in the- While have in I. thisf f application spe-" L ci ficallyj f described" one '--embeciimene which ihy' invention-may assume inPraCtice;

it lS to 'be' understood that "the "invention f isnot' parting from its "spirit.

' l/Vha't I claimas "new and'desireto secure (by Letters .Batent, is: g i "with work perform The" combination ing means and means for feeding said work performing means: of feed controlling means including a non-elastic apertured feed restraining member through the aperture of which a portion of the feeding means extends, and means disposed longitudinally to said feeding means and operable at a distance from the member for moving said member to vary its feed restraining capacity.

2. The combination with work performing means and means for feeding said work performing means: of feed controlling means including a non-elastic eccentrically apertured feed restraining member, a friction band between the feeding means and the restraining member, and means for moving said member to vary its feed restraining capacity.

3. The combination with work performing means and means for feeding said work performing means: of feed controlling means including a feed restraining member movable about a pivot not lying in a plane with the axis of the feed controlling means into operative position, means for normally retaining said member in inoperative position, and means for moving said member to vary its feed restraining capacity.

4:. The combination with work performing means and means for feeding said work performing means: of feed controlling means including a non-elastic feed restraining member, means for normally retaining said member in inoperative position, and means longitudinally disposed to said feeding means operable at a distance from the member for moving said member to vary its feed restraining capacity.

5. The combination with work performing means and means for feeding said work performing means: of feed controlling meansincluding a non-elastic feed restraining member, means for normally retaining said member in inoperative position, a friction band between the feeding means and the restraining member, and means for imparting a longitudinal component of movement to said member to vary its feed restraining capacity.

6. The combination with work perform- Tliese' fand otlier 'iadvamgag-ee will; "performing f means "for feediiigsaid work of f feed controlling means including a non-ensueeed=- restra1a means and means ing member,fautomatic means for normally fretaiiiing "d ineinber- 'iiiopeiati've-*posin, on the 1 side of and extending lon itudinally f thedeeding means*-for-inovi1i"-s kinember 'to'va'ry its feed restraining capac ty. I '7."Thecombination withw'ork- 'e'rform ing means and means for' feeding saidfwork performing means: of feed controlling means *ing memner, 'mabmatic meansefer neeman retaining said memberin'inoperative position, and manually operable means mounted on the side of and extending longitudinally. of the feeding means and operable at a distance from the member for moving said member to vary its feed restraining ,capacity. S. The combination with work performing means and means for feeding said work performing means: of feed controlling means including a pivoted non-elastic feed restraining member, automatic means for normally re'tainingsaid member in inoperative position, and manuallyoperable means mounted on the side of and extendinglongitudinally of the feeding means for moving said member to vary its feed restraining capacity.

9. The combination with work performing means and means for feeding said work performing means: of feed controlling means including a non-elastic feed restraining member, automatic means for normally retaining said member in inoperative posi-v tween said feed restraining device and said piston rod to retard their relative movement.

11. In a stoping drill having a pneumatic tool, a feed cylinder attached thereto, and fluid control means forsaid tool and feed cylinder: a feed restraining device mounted on the opposite endof the feed cylinder from the tool, and means mounted adjacent said fluid control means for operating said restraining device.

12. The combination with work performing means and means for feeding said work performing means including relatively movai1d nianually {operable means 4 mounted including noa eiasae teed resurain v able elements, of feed controlling means including a feed restraining member provided with an aperture through which one of said relatively movableelements extends and to which when it is in inoperative position the axis of said last mentioned element is perpendicular, means for normally maintaining said member in inoperative position, and means to move it about a fixed axis to a position in which said first mentioned axis will make an angle therewith.

13. The combination with work performing means and means for feeding said work performing means. including relatively movable elements, of feed controlling means including a :Eeedrestraining member provided with an aperture through which one of said relatively movable elements extends and which when in a predetermined angular relation to the axis of said last mentioned element is inoperative, means for normally maintaining said member in said inoperative relation, andmeans for varying the angular relation between saidfmember and said element to eiiect braking of said feeding means. 25

In testimony whereof I afi ix my signature.

GEORGE H; GLASER. 

